Kilojoules to Calories
Convert kilojoules (kJ) to calories (kcal) instantly — with formula and reference table.
kJ
kcal
Quick answer: 1 kJ = 0.239006 kcal. To convert kilojoules to calories, multiply by kJ × 0.239006.
Converting kilojoules to calories
This converter changes a value in kilojoules (kJ) into calories (kcal). One kilojoule equals 0.239006 kcal. Food energy is labelled in kilojoules (kJ) or kilocalories (kcal). One kilocalorie equals 4.184 kilojoules. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
kcal = kJ × 0.239006
Example
Convert 10 kJ to kcal: 10 × 0.239006 = 2.390057 kcal.
Kilojoules to Calories conversion table
| Kilojoules (kJ) | Calories (kcal) |
|---|---|
| 1 kJ | 0.239006 kcal |
| 2 kJ | 0.478011 kcal |
| 3 kJ | 0.717017 kcal |
| 5 kJ | 1.195029 kcal |
| 10 kJ | 2.390057 kcal |
| 20 kJ | 4.780115 kcal |
| 25 kJ | 5.975143 kcal |
| 50 kJ | 11.950287 kcal |
| 100 kJ | 23.900574 kcal |
How to use this converter
- Enter a value in the kilojoules (kJ) field.
- Read the converted value in calories (kcal) below.
- Type into the kcal field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many calories are in a kilojoule?
1 kilojoule equals 0.239 kilocalories (food calories).
How do I convert 2000 kJ to calories?
2000 times 0.239 = 478 kcal.
Are food calories the same as kcal?
Yes. A dietary Calorie (capital C) is one kilocalorie (kcal).